C# Winform 实现TCP发消息
作者：小草上飞飞
这篇文章主要介绍了C# Winform 实现TCP发消息的示例，帮助大家更好的理解和学习使用c#技术，感兴趣的朋友可以了解下
服务端：
窗体
代码：
using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Windows.Forms;
namespace SocketStudy
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
/// <summary>
/// 负责通信的socket
/// </summary>
Socket socketSend;
/// <summary>
/// 负责监听Socket
/// </summary>
Socket socket;
/// <summary>
/// 存放连接的socket
/// </summary>
Dictionary<string, Socket> dictionary = new Dictionary<string, Socket>();
/// <summary>
/// 开始监听
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void button1_Click(object sender, EventArgs e)
{
//创建监听的socket,
//SocketType.Stream 流式对应tcp协议
//Dgram,数据报对应UDP协议
socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
//创建IP地址和端口号
IPAddress ip = IPAddress.Any;//IPAddress.Parse(textServerIP.Text);
int port = Convert.ToInt32(textServerPort.Text);
IPEndPoint iPEndPoint = new IPEndPoint(ip, port);
//让负责监听的Socket绑定ip和端口号
socket.Bind(iPEndPoint);
ShowLog("监听成功！" + ip + "\t" + port);//打印日志
//设置监听队列
socket.Listen(10);//一段时间内可以连接到的服务器的最大数量
Thread thread = new Thread(Listen);
thread.IsBackground = true;
thread.Start(socket);
}
/// <summary>
/// 使用线程来接收数据
/// </summary>
/// <param name="o"></param>
private void Listen(object o)
{
Socket socket = o as Socket;
while(true){
//负责监听的socket是用来接收客户端连接
//创建负责通信的socket
socketSend = socket.Accept();
dictionary.Add(socketSend.RemoteEndPoint.ToString(), socketSend);
clientCombo.Items.Add(socketSend.RemoteEndPoint.ToString());
ShowLog(socketSend.RemoteEndPoint.ToString() + "已连接");
//开启新线程，接收客户端发来的信息
Thread th = new Thread(receive);
th.IsBackground = true;
th.Start(socketSend);
}
}
//服务器接收客户端传来的消息
private void receive(object o)
{
Socket socketSend = o as Socket;
while (true)
{
try
{
//客户端连接成功后，服务器接收客户端发来的消息
byte[] buffer = new byte[1024 * 1024 * 2];//2M大小
//接收到的有效字节数
int length = socketSend.Receive(buffer);
if (length == 0)
{
ShowLog(socketSend.RemoteEndPoint.ToString() + "下线了。");
dictionary[socketSend.RemoteEndPoint.ToString()].Shutdown(SocketShutdown.Both);
dictionary[socketSend.RemoteEndPoint.ToString()].Disconnect(false);
dictionary[socketSend.RemoteEndPoint.ToString()].Close();
break;
}
string str = Encoding.ASCII.GetString(buffer, 0, length);
ShowLog(socketSend.RemoteEndPoint.ToString() + "\n\t" + str);
}
catch (Exception ex)
{
Console.WriteLine(ex.Message);
}
}
}
/// <summary>
/// 日志打印
/// </summary>
/// <param name="str"></param>
private void ShowLog(string str)
{
textLog.AppendText(str + "\r\n");
}
private void Form1_Load(object sender, EventArgs e)
{
//取消对跨线程调用而产生的错误
Control.CheckForIllegalCrossThreadCalls = false;
}
private void sendMsgBtn_Click(object sender, EventArgs e)
{
string txt = textMsg.Text;
byte[] buffer = Encoding.UTF8.GetBytes(txt);
List<byte> list = new List<byte>();
list.Add(0); // 0 为 发消息
list.AddRange(buffer);
byte[] newBuffer = list.ToArray();
//socketSend.Send(buffer);
string ip = clientCombo.SelectedItem.ToString();//获取选中的ip地址
Socket socketsend=dictionary[ip];
socketsend.Send(newBuffer);
}
private void selectBtn_Click(object sender, EventArgs e)
{
OpenFileDialog fileDialog = new OpenFileDialog();
fileDialog.InitialDirectory=@"D:";
fileDialog.Title="选择文件";
fileDialog.Filter = "所有文件|*.*";
fileDialog.ShowDialog();
pathTxt.Text = fileDialog.FileName;
}
/// <summary>
/// 发文件，
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void sendFileBtn_Click(object sender, EventArgs e)
{
string path = pathTxt.Text;
FileStream fileStream = new FileStream(path,FileMode.Open,FileAccess.Read);
byte[] buffer = new byte[1024*1024*3];
buffer[0] = 1;// 1 为发文件的标志位
int length = fileStream.Read(buffer, 1, buffer.Length-1);
fileStream.Close();
string ip = clientCombo.SelectedItem.ToString();//获取选中的ip地址
Socket socketsend = dictionary[ip];
socketsend.Send(buffer,0, length+1, SocketFlags.None);
}
/// <summary>
/// 抖一抖
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void shockBtn_Click(object sender, EventArgs e)
{
byte[] buffer = new byte[1];
buffer[0] = 2;// 2 为抖一抖
string ip = clientCombo.SelectedItem.ToString();//获取选中的ip地址
Socket socketsend = dictionary[ip];
socketsend.Send(buffer);
}
/// <summary>
/// 关闭前关闭socket
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
try
{
socket.Shutdown(SocketShutdown.Both);
socket.Disconnect(false);
socket.Close();
}
catch
{
socket.Close();
}
}
}
}
客户端：
窗体
代码
using System;
using System.Collections.Generic;
using System.IO;
using System.Net;
using System.Net.Sockets;
using System.Text;
using System.Threading;
using System.Windows.Forms;
namespace Client
{
public partial class Form1 : Form
{
public Form1()
{
InitializeComponent();
}
Socket socket;<br> //连接
private void connectBtn_Click(object sender, EventArgs e)
{
try
{
//创建负责通信的socket
socket = new Socket(AddressFamily.InterNetwork, SocketType.Stream, ProtocolType.Tcp);
//地址、端口
IPAddress ip = IPAddress.Parse(ipText.Text);
int serverPort = Convert.ToInt32(portText.Text);
IPEndPoint port = new IPEndPoint(ip, serverPort);
//连接到服务器
socket.Connect(port);
ShowLog("已连接");
//启动接收数据线程
Thread th = new Thread(receive);
th.IsBackground = true;
th.Start();
}
catch { }
}<br> //日志
private void ShowLog(string str)
{
textLog.AppendText(str + "\r\n");
}
/// <summary>
/// 发消息
/// </summary>
/// <param name="sender"></param>
/// <param name="e"></param>
private void sendMsgBtn_Click(object sender, EventArgs e)
{
try
{
string txt = sendMsg.Text;
byte[] buffer = Encoding.ASCII.GetBytes(txt);//ascii编码
socket.Send(buffer);
}
catch { }
}
<br> //接收消息<br>
private void receive()
{
while (true)
{
try
{
byte[] buffer = new byte[1024 * 1024 * 2];
int length = socket.Receive(buffer);
if (length == 0)
{
break;
}
if (buffer[0] == 0)
{
string txt = Encoding.UTF8.GetString(buffer, 1, length-1);
ShowLog(socket.RemoteEndPoint + ":\r\t" + txt);
}else if (buffer[0] == 1)
{
SaveFileDialog saveFileDialog = new SaveFileDialog();
saveFileDialog.InitialDirectory = @"E:\";
saveFileDialog.Title = "饿了吃什么";
saveFileDialog.Filter = "所有文件 | *.*";
saveFileDialog.ShowDialog(this);
string path = saveFileDialog.FileName;
FileStream fileStreamWrite = new FileStream(path, FileMode.OpenOrCreate, FileAccess.Write);
fileStreamWrite.Write(buffer,1,length-1);
fileStreamWrite.Close();
MessageBox.Show("保存成功");
}else if (buffer[0] == 2)
{
ZD();
}
}
catch { }
}
}
//震动
private void ZD()
{
for(int i=0;i<20;i++){
if (i%2==0)
{
this.Location = new System.Drawing.Point(500, 500);
}
else
{
this.Location = new System.Drawing.Point(530, 530);
}
Thread.Sleep(20);
}
}
//取消跨线程检查
private void Form1_Load(object sender, EventArgs e)
{
Control.CheckForIllegalCrossThreadCalls = false;
}
//关闭前关掉socket
private void Form1_FormClosing(object sender, FormClosingEventArgs e)
{
socket.Disconnect(false);
socket.Close();
}
//断开连接
private void button1_Click(object sender, EventArgs e)
{
if (socket !=null)
{
socket.Disconnect(false);
}
}
}
}
运行结果：
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